Pipe reaming and burring attachment for stock and die implements



LIENDO 2,547,195

April 13,195] Y 'r. A. cA'

PIPE REAMING AND BURRING ATTACHMENT FOR STOCK AND DIE IMPLEMENTS Filed Dec. 16, 1948 II III! I IN VEN TOR. THO/V66" 6 C'fiZ/f/VPO Patented Apr. 3, 1951 UNITED STATES PATENT OFFICE PIPE REAMIN G AND BURRING ATTACH- MENT FOR STOCK AND DIE IMPLEMENTS Thomas A. Caliendo, South Ozone Park, N. Y. Application December 16, 1948, Serial No. 65,656

1 Claim. 1

This invention relates to reamers, and in particular to a type adapted to be mounted in association with a pipe threading stock and die.

- A particular object of the invention is to provide a reamer that is mounted in a holder so that the reamer tool can be easily and quickly adjusted to the end of the pipe being threaded and one that is tensioned to provide the necessary reaming pressure as the threading dies advance with respect to the end of the pipe being threaded.

Further objects of my invention include a mounting for a reamer that provides for an initial adjustment of the reamer to cutting position with a minimum of time and effort and thereafter further pressure adjustment of varying nature depending upon the hardness of the pipe metal; to provide a thread operated adjusting means for initially positioning the reamer and yieldable cushioning means that may be varied in yielding force to suit the operating conditions, and to provide a tool in which the reamer may be directly adjusted through the use of an adjustable slide member that coacts with yielding means to maintain a desired reaming pressure on the parts.

With these and other objects in view, the invention comprises certain constructions hereinafter described and then particularly pointed out in the claim, and a preferred embodiment of my invention is illustrated in the accompanying drawing, in which:

Figure 1 is a view in side elevation, parts being shown in section, of a reamer attachment tobe used in association with a pipe or tube threading tool;

Figure 2 is a section on the line 22 of Figure 1, showing th adjustable connection between the reamer tool and the holder;

Figure 3 is a view in side elevation of the reamer attachment showing an adjusted position of the tool;

Figure 4 is a view similar to Figure 3 showing a position of the parts when the reamer is under a maximum working tension;

Figure 5 is a view in side elevation, a part being illustrated in section, showing a modified form of the invention; and

Figure 6 is a section on the line 66 of Figure 5 showing the association of the adjustable parts of the holder and reamer.

Referring to the drawing in detail, l0 indicatesthe threading dies of a conventional stock and die threading tool ll used, for instance, in cutting a thread on the end of a pipe [2 from the inside open end of the latter of which it is desired to remove the burr left in the cutting operation, and to smoothen the end of the pipe by reaming a finishing bevel therein] It is usual to mount the reamer device directly on the dies I9 and to this end, I employ a holder frame I3 comprising a ring or annular section M having laterally extending wings or tabs l5 and vertically disposed posts [6 shaped to provide vertical guide ribs I! on the inner surfaces thereof. The upper ends of the posts are bridged by a yoke l8 seating in recessed upper extremities of the posts and detachably secured thereto by the screws 19. The holder is secured to the dies by machine screws 2| and can be readily detached therefrom, the tabs i5 being suitably slotted to permit adjustment of the cutting dies.

The reaming or burring cutter 26 is of the conventional conically fluted type and is adapted to the holder with a minimum amount of change. It is centrally recessed in the upper end to provide a bore 22 in which is fixed, in any suitable manner, the lower end of a threaded spindle 23 which, in turn, operates in the internally threaded bore 24 of an adjusting sleeve 25. The latter, as Well as the spindle and the reamer, are arranged concentrically with respect to each other and axially of the holder. The sleeve is threaded at its upper end as at 26 and passes a freely through a hole 21 in the yoke l8, the hole being concentric with a seat 27A formed in the under side of the yoke to provide a bearing surface for a spring 28 encircling the sleeve and bearing at its opposite end against a collar 29 abutting the lower end of said sleeve. The bore 22 opens into a cavity 30 in the reamer into which the sleeve 25 extends to raise the former to maximum position as shown in Figure 1. Through the use of the cavity the holder may be of minimum length while permitting maximum adjustment of the reamer to fit diiferent sizes of pipe. The threaded end 26 of the adjusting sleeve or rod above the yoke has fixed thereto as by a set-screw 31, a thumb nut 32 through the medium of which the sleeve may be manually rotated to raise and lower the reamer by the retraction or projection, respectively, of

the spindle 23. In Figure 3, the reamer is in cutting position with respect to the end of the pipe with the spindle partly projected. The' spring 28 will yield as the reamer revolves. In order to increase the tension, operation of the thumb screw to further project the spindle will place the spring under greater tension and, as

along the guide ribs H, the teeth 33 adjacent said flutes being flattened in their upper reaches as at 34 to fit between the posts I6 of theholder frame. By removing the yoke, the reaming cutter can be quickly removed for sharpening or replacement. H In the form of the inventiqn shownin the frame 35 comprises posts lifihaving inner ribs 31 for guiding the vertical adjustment ofv the reamer 38 as the latter is forced down by a spring 39 acting between an upper seatdllin a yoke 4| and a'cavity 42 in the upperend of the reamer 38. The spring is tensionedby adjustment of the yoked! which is channelled as at 43 to have sliding fit over the posts 36 and slotted as at 44 to allow passage of screws 45 through which the yoke is held in any adjusted position or completely removed. The reamer has secured axially thereof a rod 46, the upper threaded end of which carries a thumb nut-48 so that the reamer can be raised or lowered as will be understood. The frame 35 has the same shape in its base portion as does the frame of device l3 and is adapted for attachment in like manner to the dies of a stock and die tool.

It is evident, therefore, that I have provided a My invention is not to be restricted to the precise details of construction shown since various changes and modifications may be made therein without departing from the scope of the invention or sacrificing the advantages to be derived from its use.

What I claim is:

A reamer adapted to be mounted on a pipe threading implement for burring the open end of the pipe during a threading operation comprising a frame, including a yoke portion, means for demountably securing the frame to the implement, a cutter having a recess in the top face thereof, a threaded spindle secured in the recess and extending upwardly out of said cutter, a sleeve threaded over said spindle and projecting upwardly through ahole in the frame the lower end of the sleeve being shaped to provide a collar and theupper end being externally threaded, a thumb nut on said upperthreaded end above said frame, meansfor securing thBfDUtQtOQ the sleeve whereby thelatter can be, moved axially ofthe': spindle to raise and lower the cutter and to "vary;- the work engaging pressure thereof, andcoacting means on the, cutter and on the framefor pree: venting turning movement of the cutter rel tively tocthe frame.

. THOMAS "AQCALIENDO REFERENCES ciTED 4 The following references are} of record {the file-of this patent: a if i 5 UNITED STATES.PATENTSv Number Name 1 Dat'ei';

981,492 Stevens Jan.. 10, 1911 1,801,730 Elliott Apr. 21,1.19312 2,458,681

Caliendo Jan. 11,.1949" 

